# CVE-2021-35243: HTTP PUT & DELETE Methods Enabled

> Attackers can exploit enabled HTTP PUT and DELETE methods to modify or delete data, compromising integrity in SolarWinds Web Help Desk.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Dec 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-cj38-v3pg-8cgq

## What is CVE-2021-35243?

CVE-2021-35243 is a medium-severity vulnerability in SolarWinds Web Help Desk, published on 23 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The HTTP PUT and DELETE methods were enabled in the Web Help Desk web server (12.7.7 and earlier), allowing users to execute dangerous HTTP requests. The HTTP PUT method is normally used to upload data that is saved on the server with a user-supplied URL. While the DELETE method requests that the origin server removes the association between the target resource and its current functionality. Improper use of these methods may lead to a loss of integrity.

Weakness: CWE-749 (Exposed Dangerous Method or Function)

## Which versions are affected by CVE-2021-35243?

It affects 1 product.


Products: Solarwinds Web Help Desk.

## How do I fix CVE-2021-35243?

No fix has been published for CVE-2021-35243 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35243 being exploited?

There is no known exploitation of CVE-2021-35243 in the wild and no public exploit code.

## Other vulnerabilities in SolarWinds Web Help Desk

- [CVE-2025-40551](https://insights.sbomify.com/CVE-2025-40551/): SolarWinds Web Help Desk Deserialization of Untrusted Data (critical 9.8, exploited in the wild)
- [CVE-2025-26399](https://insights.sbomify.com/CVE-2025-26399/): SolarWinds Web Help Desk Deserialization of Untrusted Data (critical 9.8, exploited in the wild)
- [CVE-2024-28986](https://insights.sbomify.com/CVE-2024-28986/): SolarWinds Web Help Desk Deserialization of Untrusted Data (critical 9.8, exploited in the wild)
- [CVE-2024-28987](https://insights.sbomify.com/CVE-2024-28987/): SolarWinds Web Help Desk Hardcoded Credential (critical 9.1, exploited in the wild)
- [CVE-2025-40536](https://insights.sbomify.com/CVE-2025-40536/): SolarWinds Web Help Desk Security Control Bypass (high 8.1, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35243 and fix it if it is affected.

What it is: CVE-2021-35243 is a medium-severity vulnerability in SolarWinds Web Help Desk, published on 23 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-35243 in the wild and no public exploit code.

Affected product: SolarWinds Web Help Desk. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-35243/ (Markdown: https://insights.sbomify.com/CVE-2021-35243/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35243
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35243
- OSV: https://osv.dev/vulnerability/CVE-2021-35243

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-35243/
Summaries are generated and may contain mistakes; the official description above is the record.